Nelms, D.L., and Harlow, G.E., Jr.,  2000, The Virginia aquifer susceptibility study: Dating of ground water for source water assessment [abs.], in Poff, J.A., and Shabman, Leonard, (eds.) 1999 Virginia Water Research Symposium: Integrating science into development and implementation of effective water resource policies Virginia Water Resources Research Center, p. 149.    

Nelms, D.L., Plummer, L.N., and Busenberg, Eurybiades, 1999, Ground-water dating to predict aquifer susceptibility in crystalline terranes of Virginia [abs.]: Geological Society of America Abstracts with Programs, v. 31, no. 3, p. 78.    

Virginia Ground Water Protection Steering Committee meeting,
November 2000, Richmond, Va.   

Busenberg, Eurybiades, and Plummer, L.N., 1997, Use of sulfur hexafluoride as a dating tool and as a tracer of igneous and volcanic fluids in ground water [abs.]: Geological Society of America Abstracts with Programs, v. 29, no. 6, p. A-78.

Busenberg, Eurybiades and Plummer, L.N., 2000, Dating young groundwater with sulfur hexafluoride: Natural and anthropogenic sources of sulfur hexafluoride: Water Resources Research, v. 36, no. 10, p. 3011-3030.

Dunkle, S.A., Plummer, L.N., Busenberg, Eurybiades, Phillips, P.J., Denver, J.M., Hamilton, P.A., Michel, R.L., and Coplen, T.B., 1993, Chlorofluorocarbons (CCl₃F and CCl₂F₂) as dating tool and hydrologic tracers in shallow groundwater of the Delmarva Peninsula, Atlantic Coastal Plain, United States: Water Resources Research, v. 29, no. 12, p. 3837-3860.

Focazio, M.J., 1997, Ground-water residence times in shallow aquifers of the Chesapeake Bay watershed [abs.]: Geological Society of America Abstracts with Programs, v. 29, no. 6, p. A-76.

McFarland, E.R., 1997, Hydrogeologic framework, analysis of ground-water flow, and relations to regional flow in the Fall Zone near Richmond, Virginia: U.S. Geological Survey Water-Resources Investigations Report 97-4021,  56 p.

Nelms, D.L., 1997, Use of chlorofluorocarbons to delineate ground-water-flow systems, Naval Weapons Station Yorktown, Yorktown, Virginia [abs.]: Geological Society of America Abstracts with Programs, v. 29, no. 6, p. A-76.    

Nelms, D.L., and Ahlin, R.J, 1993, Use of chlorofluorocarbons to age date ground water in Prince William County, Virginia [abs.]: Collected abstracts of the 1993 Virginia Water Resources Conference, Richmond, Virginia, April 12-14, 1993, p. 67.  

Nelms, D.L., and Brockman, A.R., 1993, Well-construction, water-level, and ground-water-quality data for Prince William County, Virginia, 1992: U.S. Geological Survey Open-File Report 93-443, 73 p.

Nelms, D.L., and Brockman, A.R., 1997, Hydrogeology of, quality and recharge ages of ground water in, Prince William County, Virginia, 1990-91: U.S. Geological Survey Water-Resources Investigations Report 97-4009,  58 p.

Nelms, D.L., Harlow, G.E., Jr.,  and Brockman, A.R., 2001, Apparent chlorofluorocarbon age of ground water of the shallow aquifer system, Naval Weapons Station Yorktown, Yorktown, Virginia:  U.S. Geological Survey Water-Resources Investigations Report 01-4179, 51 p. 

Plummer, L. N., Busenberg, Eurybiades, Böhlke, J.K., Carmody, R.W., Casile, G.C., Coplen, T.B., Doughten, M.W., Hannon, J.E., Kirkland, Wandee, Michel, R.L., Nelms, D.L., Norton, B.C., Plummer, K.E., Qi, H., Revesz, K., Schlosser, Peter, Spitzer, Shane, Wayland, J.E., and Widman, P.K., 2000, Chemical and isotopic composition of water from springs, wells, and streams in parts of Shenandoah National Park, Virginia, and vicinity, 1995-1999: U.S. Geological Survey Open-File Report 00-373, 70 p.

Plummer, L.N., Busenberg, Eurybiades, Böhlke, J.K., Nelms, D.L., Michel, R.L., and Schlosser, Peter, 2000, Ground-water residence times and water-quality trends in spring discharge from Shenandoah National Park, Virginia [abs.]: Eos, May 9, 2000, American Geophysical Union, p. S260.

Plummer, L.N., Busenberg, E., Böhlke, J.K., Nelms, D.L., Michel, R.L., and Schlosser, P., 2001, Groundwater residence times in Shenandoah National Park, Blue Ridge Mountains, Virginia, USA: A multi-tracer approach. Chemical Geology, v. 179, p. 93-111.    

Plummer, L.N., Nelms, D.L., Busenberg, Eurybiades, Böhlke, J.K., and Schlosser, Peter, 1999, Residence times of ground water and spring discharge in Shenandoah National Park, Virginia [abs.]: Geological Society of America Abstracts with Programs, v. 31, no.7, p. A-331.

Speiran, G.K., 1996, Geohydrology and geochemistry near coastal ground-water-discharge areas of the Eastern Shore of Virginia: U.S. Geological Survey Water-Supply Paper 2479, 73 p.

Busenberg, Eurybiades, and Plummer, L. N., 1991, Chlorofluorocarbons (CCl₃F and CCl₂F₂)-- Use as an age dating tool and hydrologic tracer in shallow ground-water systems; in Mallard G. L. and Aronson, D. A. (eds.), Proceedings, U.S. Geological Survey Toxic Substances Hydrology Program, technical meeting. Monterey, Calif., March 11-15, 1991: U.S. Geological Survey Water-Resources Investigations Report 91-4034, p. 542-547.

Busenberg, Eurybiades, and Plummer, L.N., 1992, Use of chlorofluorocarbons (CCl₃F and CCl₂F₂) as hydrologic tracers and age-dating tools--The alluvium and terrace system of central Oklahoma: Water Resources Research, v. 28, no.9, p. 2257-2283.

Busenberg, Eurybiades, and Plummer, L.N., 1993, Use of trichlorofluorocarbon-113 (CFC-113) as a hydrologic tracer and age-dating tool for young ground water, (abs.): Geological Society of America, 1993 Annual Meeting, Abstracts with Programs, 1993, p. A-365.

Clark, I.D., and Fritz, Peter, 1997, Environmental isotopes in hydrogeology: New York, Lewis Publishers, 328 p.

Michel, R.L., 1989, Tritium deposition in the Continental United States 1953-1983: U.S. Geological Survey Water-Resources Investigations Report 89-4072, 46 p.

Plummer, L.N., and Busenberg, Eurybiades, 2000, Chlorofluorocarbons, in Cook, P., and Herczeg, A., eds., Environmental tracers in subsurface hydrology, chapter 15: Kluwer Academic Publishers, p. 441-478.

Schlosser Peter, Stute, Martin, Dorr, H., Sonntag, C.,  and Munnich, K.O., 1988, Tritium/³He dating of shallow groundwater: Earth and Planetary Science Letters 89:353-62.

Schlosser, Peter, 1992, Tritium/³He dating of waters in natural systems, in Isotopes of noble gases as tracers in environmental studies: Vienna, IAEA, p. 123-145.

Solomon, D.K., and Sudicky, E.A., 1991, Tritium and helium-3 isotope ratios for direct estimation of spatial variations in groundwater recharge: Water Resources Research, v. 27, no. 9, p. 2309-2319.